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POCan't set CATiledLayer.FadeDuration in MonoTouch
 

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  1. POCan't set CATiledLayer.FadeDuration in MonoTouch
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    <p>I'm trying to remove fading animation from <code>CATiledLayer</code>. </p> <p>Setting <code>CATiledLayer.FadeDuration</code> static property doesn't work and is not supposed to, according to this closed bug report: <a href="https://bugzilla.novell.com/show_bug.cgi?id=648993" rel="nofollow noreferrer">https://bugzilla.novell.com/show_bug.cgi?id=648993</a></p> <p>The suggested solution in Objective-C is to subclass <code>CATiledLayer</code>: <a href="https://stackoverflow.com/questions/1073727/how-to-change-iphone-catiledlayer-fadeduration">How to change iphone CATiledLayer fadeDuration?</a>. I've implemented this in MonoTouch but nothing is being drawn in the view, although <code>DrawInContext</code> is called as expected. </p> <p>The complete code to reproduce the problem is below. As soon as I remove <code>[Export("fadeDuration")]</code> everything works (but with animation). </p> <p>Thanks in advance for any help.</p> <pre><code>using System; using System.Drawing; using MonoTouch.CoreAnimation; using MonoTouch.UIKit; using MonoTouch.Foundation; using MonoTouch.ObjCRuntime; [Register("NoFadeTiledLayer")] public class NoFadeTiledLayer : CATiledLayer { public NoFadeTiledLayer () : base() {} public NoFadeTiledLayer (IntPtr handle) : base(handle) {} public override void DrawInContext (MonoTouch.CoreGraphics.CGContext ctx) { // This is being called everytime base.DrawInContext (ctx); } [Export("fadeDuration")] public static new double FadeDuration () { return 0; } } public class ContentView : UIView { [Export("layerClass")] public static Class LayerClass () { return new Class (typeof(NoFadeTiledLayer)); } public override void Draw (RectangleF rect) { DrawString ("Lorem ipsum", rect, UIFont.SystemFontOfSize (15)); } } [Register("AppDelegate")] public class AppDelegate : UIApplicationDelegate { static void Main (string[] args) { UIApplication.Main (args, null, "AppDelegate"); } public override bool FinishedLaunching (UIApplication app, NSDictionary options) { var window = new UIWindow (UIScreen.MainScreen.ApplicationFrame); window.BackgroundColor = UIColor.Green; var view = new ContentView (); view.BackgroundColor = UIColor.White; view.Frame = window.Bounds; window.AddSubview (view); window.MakeKeyAndVisible (); return true; } } </code></pre>
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    1. USAlexander Shirshov
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    1. COYou are doing things right; I am not sure why it is not drawing for you. Is there a reason for overriding DrawInContext in your sample?
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      1. POCan't set CATiledLayer.FadeDuration in MonoTouch
      1. USmiguel.de.icaza
    2. COMiguel, I overrode DrawInContext to give you a place to set the breakpoint and see for yourself that it's being called. I'm guessing that my export of fadeDuration somehow conflicts with what MonoTouch provided for CATiledLayer.
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      1. POCan't set CATiledLayer.FadeDuration in MonoTouch
      1. USAlexander Shirshov
 

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